368561791221 has 32 divisors (see below), whose sum is σ = 554732314752. Its totient is φ = 216129392640.

The previous prime is 368561791211. The next prime is 368561791229. The reversal of 368561791221 is 122197165863.

It is not a de Polignac number, because 368561791221 - 2⁵ = 368561791189 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (368561791229) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2611420 + ... + 2748933.

It is an arithmetic number, because the mean of its divisors is an integer number (17335384836).

Almost surely, 2^368561791221 is an apocalyptic number.

It is an amenable number.

368561791221 is a deficient number, since it is larger than the sum of its proper divisors (186170523531).

368561791221 is a wasteful number, since it uses less digits than its factorization.

368561791221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5360453.

The product of its digits is 1088640, while the sum is 51.

The spelling of 368561791221 in words is "three hundred sixty-eight billion, five hundred sixty-one million, seven hundred ninety-one thousand, two hundred twenty-one".